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Moisture Indicator

·Both Model RGN sight glass and Model RGS sight glass are used on the liquid piping of the refrigeration and air conditioning unit to indicate the flow condition of the refrigerant, water cut of the refrigerant and lubricant oil flow condition of the oil return piping on the oil separator.
·Model RGN sight glass and Model RGS sight glass are equipped with one moisture indicator, which will change color to indicate the water cut in the refrigerant.
·Model RGR sight glass is used to indicate the level of the refrigerant in the liquid drum and the lubricant oil level in the compressor crankcase.
·The modified PTFE sealing is used in both Model RGN sight glass and Model RGR sight glass, which is applicable to various refrigerants and oils with perfect sealing performance.
·The structure of both Model RGN sight glass and Model RGR sight glass is an explosionproof press fit and the viewing glass is clear and safety.
·Model RGS sight glass is an independent body structure with conventional sintered glass
and O-ring seal.
Features:
Model RGN and Model RGS
·Be applicable to HCFC/HFC refrigerants.
·Indicate high water cut in system if any.
·Indicate no overcooling in refrigerant liquid.
·Indicate insufficient charging of refrigerant if any.
·Both welded and threaded connections are available.
Model RGR
·Be applicable to HCFC/HFC refrigerants.
·Indicate the liquid level in the liquid drum.
·Indicate the oil level in the compressor crankcase.
·NPT threaded connection
Technical Parameters:
Applicable Refrigerant HCFC and HFC Max. Operating Pressure 3.5MPa
Applicable Medium Temperature -40℃~+80℃ Max. Allowable Pressure 4.5MPa
Yearly Leakage of Refrigerant ≤2g R22/a
Correlation between Water Cut and Color:
Water Cut (ppm)
25℃ 43℃
GReen Medium color Yellow GReen Medium color Yellow
R22/R502 <30 30~120 >120 <50 50~200 >200
HFC-134a <30 30~100 >100 <45 45~170 >170
R404a <20 20~70 >70 <25 25~100 >100
R407a <30 30~140 >140 <60 60~225 >225
R507 <15 15~60 >60 <30 30~100 >110
Specification:
Model of Welded Connection size Model of Threaded Connection size
RGN-1/4ODF RGN-1/4ODF 1/4(Ø6) RGN-1/4SAE RGN-1/4SAE 1/4(Ø6)
RGN-3/8ODF RGN-3/8ODF 3/8(Ø10) RGN-3/8SAE RGN-3/8SAE 3/8(Ø10)
RGN-1/2ODF RGN-1/2ODF 1/2(Ø12) RGN-1/2SAE RGN-1/2SAE 1/2(Ø12)
RGN-5/8ODF RGN-5/8ODF 5/8(Ø16) RGN-5/8SAE RGN-5/8SAE 5/8(Ø16)
RGN-3/4ODF RGN-3/4ODF 3/4(Ø19) RGN-3/4SAE RGN-3/4SAE 3/4(Ø19)
RGN-7/8ODF RGN-7/8ODF 7/8(Ø22) RGR-3/4NPT 3/4NPT
—— —— —— RGR-G3/4 G3/4

Model A B ØC ØD E F L S Tread M Weight
RGN型 RGS型
RGN/RGS-1/4 ODF 9.5 14.5 28 6.5 7 27 102 14 ———— 105 125
SAE —— —— 14 6 7/16-20UNF 145 145
RGN/RGS-3/8 ODF 10.1 8 36 119 ———— 110 155
SAE 12.5 16.5 —— —— 17 70 19 5/8-18UNF 215 195
RGN/RGS-1/2 ODF 12.8 10 46 146 172 150
SAE 13 18 —— —— 19 78 22 3/4-16UNF 240 210
RGN/RGS-5/8 ODF 16.1 14 46 152 190 220
SAE 15 20 31.5 —— —— 20 78 24 7/8-14UNF 350 300
RGN/RGS-3/4 ODF 19.1 16 51 167 270 230
SAE 18 23 —— —— 23 94 29 1-1/16-14UNF 545 440
RGN/RGS-7/8 ODF 16.5 21.5 22.3 17 54 173 27 315 290
RGR-3/4NPT NPT 10.5 13 —— —— —— —— 32 3/4NPT 70
RGR-G3/4 G G3/4 70



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